Driving device for driving discharge lamps and electronic device employing the same

Abstract

A driving device ( 100 ) for driving a plurality of discharge lamps ( 14 ), and includes a controller board ( 11 ), a connecting board ( 15 ), and a group of high voltage lines ( 17 ). The controller board includes a controller circuit ( 13 ) for converting a received signal to a high voltage signal suitable to drive the plurality of discharge lamps. The connecting board includes a balance circuit for balancing currents flowing through the plurality of discharge lamps. The connecting board is substantially perpendicular to the controller board. The high voltage lines are connected to the controller board and the connecting board, and the high voltage signal from the controller circuit is output to the balance circuit via the high voltage lines.

1. A driving device for driving a plurality of discharge lamps, comprising:
 a controller board, comprising a controller circuit for converting a received signal to a high voltage signal suitable to drive the plurality of discharge lamps; 
 a connecting board substantially perpendicular to the controller board, comprising a balance circuit comprising a plurality of conductors connecting with the corresponding discharge lamps for balancing currents flowing through the plurality of discharge lamps; and 
 a group of high voltage lines connected to the controller board and the connecting board, wherein the high voltage signal from the controller circuit is output to the balance circuit via the high voltage lines. 
 
     
     
       2. The driving device of  claim 1 , further comprising a first connector disposed on the controller board and a second connector disposed on the connecting board, and two ends of the high voltage lines respectively connected to the first connector and the second connector. 
     
     
       3. The driving device of  claim 1 , further comprising a protection circuit disposed on the connecting board, for outputting a protection signal to the controller circuit and protecting the driving device. 
     
     
       4. The driving device of  claim 3 , further comprising a group of protection lines electronically connecting the controller board and the connecting board, and the protection signal from the protection circuit output to the controller circuit via the protection lines. 
     
     
       5. The driving device of  claim 4 , further comprising a third connector disposed on the controller board and a fourth connector disposed on the connecting board, and two ends of the protection lines respectively connected to the third connector and the fourth connector. 
     
     
       6. The driving device of  claim 1 , wherein the controller circuit comprises:
 a driver circuit, for converting the received signal to an alternating current (AC) signal; 
 a transformer circuit connected to the driver circuit, for converting the AC signal to the high voltage signal for driving the plurality of loads; and 
 a pulse width modulation (PWM) controller connected to the driver circuit, for controlling output of the switch driver circuit. 
 
     
     
       7. The driving device of  claim 6 , wherein the controller circuit further comprises a feedback circuit, connected between the transformer circuit and the PWM controller, for feeding back the currents flowing through the plurality of loads. 
     
     
       8. The driving device of  claim 6 , wherein the controller circuit further comprises a power factor correction circuit, connected to the driver circuit, for converting a received signal to a direct current (DC) signal and correcting power factors of the controller circuit. 
     
     
       9. A driving device, for driving a plurality of loads, comprising:
 a controller board, configured with a controller circuit thereon for converting a received signal to a high voltage signal to drive the plurality of loads; 
 a connecting board, fixed with a balance circuit thereon comprising a plurality of conductors connecting with the corresponding loads for balancing currents flowing through the plurality of loads, the connecting board parallel to the controller board; and 
 a group of high voltage lines, electrically connecting the controller board to the connecting board; 
 wherein the high voltage signal from the controller circuit is output to the balance circuit via the high voltage lines. 
 
     
     
       10. The driving device of  claim 9 , further comprising a protection circuit disposed on the connecting board, for outputting a protection signal to the controller circuit and protecting the driving device. 
     
     
       11. The driving device of  claim 10 , further comprising a group of protection lines electrically connecting the controller board and the connecting board, and the protection signal of the protection circuit output to the controller circuit via the protection lines. 
     
     
       12. The driving device of  claim 9 , wherein the controller circuit comprises:
 a driver circuit, for converting the received signal to an alternating current (AC) signal; 
 a transformer circuit connected to the driver circuit, for converting the AC signal to the high voltage signal for driving the plurality of loads; and 
 a pulse width modulation (PWM) controller connected to the driver circuit, for controlling outputs of the switch driver circuit. 
 
     
     
       13. The driving device of  claim 12 , wherein the controller circuit further comprises a feedback circuit, connected between the transformer circuit and the PWM controller, for feeding back the currents flowing through the plurality of loads. 
     
     
       14. The driving device of  claim 12 , wherein the controller circuit further comprises a power factor correction circuit, connected to the driver circuit, for converting a received signal to a direct current (DC) signal and correcting power factors of the controller circuit. 
     
     
       15. An electronic device, comprising:
 a panel; 
 a driving device, for driving a plurality of loads parallel disposed on the panel, the driving device comprising: 
 a controller board, comprising a controller circuit for converting a received signal to a high voltage signal to drive the plurality of loads; 
 a connecting board, comprising a balance circuit comprising a plurality of conductors connecting with the corresponding loads for balancing currents flowing through the plurality of loads; in which, the connecting board is separated to the controller board; and 
 a group of high voltage lines, electrically connecting the controller board to the connecting board, the high voltage signal of the controller circuit output to the balance circuit via the high voltage lines. 
 
     
     
       16. The electronic device of  claim 15 , further comprising a protection circuit disposed on the connecting board, for outputting a protection signal to the controller circuit and protecting the driving device. 
     
     
       17. The electronic device of  claim 16 , further comprising a group of protection lines connected to the controller board and the connecting board, and the protection signal of the protection circuit output to the controller circuit via the protection lines. 
     
     
       18. The electronic device of  claim 15 , wherein the controller circuit comprises:
 a driver circuit, for converting the received signal to an alternating current (AC) signal; 
 a transformer circuit connected to the driver circuit, for converting the AC signal to the high voltage signal for driving the plurality of loads; 
 a pulse width modulation (PWM) controller connected to the driver circuit, for controlling outputs of the driver circuit; and 
 a feedback circuit, connected between the transformer circuit and the PWM controller, for feeding back the currents flowing through the plurality of loads. 
 
     
     
       19. The electronic device of  claim 18 , wherein the controller circuit further comprises a power factor correction circuit, connected to the driver circuit, for converting a received signal to a direct current (DC) signal and correcting power factors of the controller circuit.